Seven years ago, Rin was poisoned by the blood of an unidentified demon. Now at 18, she suffers from a condition simply known as 'the Cycle'. No one knows what will happen, for a human has never survived demonic poisoning.

A violent attack on the Castle of the Western Lands leaves Inuyasha suddenly as said land's ruler with the seeming loss of Sesshoumaru. What all happened on that terrible night? - Will be YAOI and dark at times. You are forewarned.